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प्रश्न
A ball rolls of the top of the stairway with a horizontal velocity u ms−1. If the steps are h m high and b m wide, the ball will hit the edge of the nth step, if:
पर्याय
n = `(2"hu")/("gb"^2)`
n = `(2"hu"^2)/("gb")`
n = `(2"hu"^2)/("gb"^2)`
n = `"hu"^2/"gb"^2`
MCQ
उत्तर
n = `(2"hu"^2)/("gb"^2)`
Explanation:
∵ R = `"u" sqrt((2"H")/"g")` ....(horizontal projection)
nb = `"u"sqrt((2"nh")/"g")`
⇒ n = `(2"hu"^2)/("gb"^2)`
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